how to log out of 2024 Premiere for Mac desktop. I can not log out. At left bottom of the window is triangle and No Form. How do I log out?

You are using desktop software.  You do not "log in" or "log out"   You are using a program that you launch from your own hard drive.    When you want to stop working on the return and save it go up to File on the top of your screen--next to the word TurboTax---click on File and then on the drop down menu under File,  click to save your return.

And next time you want to work on it, launch the program and then click File and Open Tax Return

You can also Quit.  Here's a screen shot from 2023 Mac.  Hopefully it hasn't changed from 2023.  I have screen shots of all the menu items.